错误:模块'DynamicTestModule'声明的意外值'FormGroup'

我们的项目结构如下:Angular2-webpack-starter.

我们的项目成功编译,构建并可在浏览器中看到.这里没问题.

但是当我们尝试运行测试用例时,karma and jasmine我们会收到此错误.

XXXXComponent
   :heavy_multiplication_x: Should Match Current Tab as 1
     Chrome 55.0.2883 (Mac OS X 10.10.5)
   Error: Unexpected value 'FormGroup' declared by the module 'DynamicTestModule'
       at SyntaxError.ZoneAwareError (webpack:///~/zone.js/dist/zone.js:811:0 <- config/spec-bundle.js:74048:33)
       at SyntaxError.BaseError [as constructor] (webpack:///~/@angular/compiler/src/facade/errors.js:26:0 <- config/spec-bundle.js:78913:16)
       at new SyntaxError (webpack:///~/@angular/compiler/src/util.js:151:0 <- config/spec-bundle.js:6408:16)
       at webpack:///~/@angular/compiler/src/metadata_resolver.js:475:0 <- config/spec-bundle.js:19829:40
       at Array.forEach (native)
       at CompileMetadataResolver.getNgModuleMetadata (webpack:///~/@angular/compiler/src/metadata_resolver.js:457:0 <- config/spec-bundle.js:19811:54)
       at JitCompiler._loadModules (webpack:///~/@angular/compiler/src/jit/compiler.js:165:25 <- config/spec-bundle.js:55462:64)
       at JitCompiler._compileModuleAndAllComponents (webpack:///~/@angular/compiler/src/jit/compiler.js:144:25 <- config/spec-bundle.js:55441:52)
       at JitCompiler.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/src/jit/compiler.js:98:0 <- config/spec-bundle.js:55395:21)
       at TestingCompilerImpl.compileModuleAndAllComponentsSync (webpack:///~/@angular/compiler/bundles/compiler-testing.umd.js:482:0 <- config/spec-bundle.js:78583:35)
       at TestBed._initIfNeeded (webpack:///~/@angular/core/bundles/core-testing.umd.js:761:0 <- config/spec-bundle.js:26731:40)
       at TestBed.createComponent (webpack:///~/@angular/core/bundles/core-testing.umd.js:844:0 <- config/spec-bundle.js:26814:18)
       at Function.TestBed.createComponent (webpack:///~/@angular/core/bundles/core-testing.umd.js:673:0 <- config/spec-bundle.js:26643:33)
       at Object. (webpack:///src/app/zzzz/yyyy/xxxx.component.spec.ts:20:0 <- config/spec-bundle.js:93231:37)
       at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:242:0 <- config/spec-bundle.js:73479:26)
       at ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:79:0 <- config/spec-bundle.js:73133:39)
       at ZoneDelegate.invoke (webpack:///~/zone.js/dist/zone.js:241:0 <- config/spec-bundle.js:73478:32)
       at Zone.run (webpack:///~/zone.js/dist/zone.js:113:0 <- config/spec-bundle.js:73350:43)
       at Object. (webpack:///~/zone.js/dist/jasmine-patch.js:102:0 <- config/spec-bundle.js:72848:34)
       at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (webpack:///~/zone.js/dist/jasmine-patch.js:132:0 <- config/spec-bundle.js:72878:42)
       at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (webpack:///~/zone.js/dist/jasmine-patch.js:132:0 <- config/spec-bundle.js:72878:42)
       at webpack:///~/zone.js/dist/jasmine-patch.js:129:91 <- config/spec-bundle.js:72875:130
       at ZoneDelegate.invokeTask (webpack:///~/zone.js/dist/zone.js:275:0 <- config/spec-bundle.js:73512:35)
       at Zone.runTask (webpack:///~/zone.js/dist/zone.js:151:0 <- config/spec-bundle.js:73388:47)
       at drainMicroTaskQueue (webpack:///~/zone.js/dist/zone.js:433:0 <- config/spec-bundle.js:73670:35)

我们已根据新的角度约定在app.module.ts中导入了所有这些模块.

import { FormsModule, ReactiveFormsModule } from '@angular/forms';
@NgModule({
  bootstrap: [ AppComponent ],
  declarations: [
    ...
  ],
  imports: [ // import Angular's modules
    ...
    BrowserModule,
    FormsModule,
    HttpModule,
    ReactiveFormsModule,
    ... ],
  providers: [ // expose our Services and Providers into Angular's dependency injection
    ENV_PROVIDERS,
    APP_PROVIDERS
  ],
  schemas: [
    CUSTOM_ELEMENTS_SCHEMA
  ]
})
export class AppModule {
  constructor() {}
} 

我们的testBed就是以这种方式设置的

TestBed.configureTestingModule({
   imports: [ReactiveFormsModule, FormsModule],
   declarations: [ FormGroup, XXXXComponent ], // declare the test   component
});

  fixture = TestBed.createComponent(XXXXComponent);
  comp = fixture.componentInstance; 
});

并且

testing.TestBed.initTestEnvironment(
  browser.BrowserDynamicTestingModule,
  browser.platformBrowserDynamicTesting()
);

我们安装了所有最新版本的软件包.

"@angular/common": "~2.4.3",
"@angular/compiler": "~2.4.3",
"@angular/core": "~2.4.3",
"@angular/forms": "~2.4.3",
"@angular/http": "~2.4.3",
"@angular/material": "2.0.0-beta.1",
"@angular/platform-browser": "~2.4.3",
"@angular/platform-browser-dynamic": "~2.4.3",
"@angular/platform-server": "~2.4.3",
"@angular/router": "~3.4.3",
"karma": "^1.2.0",
"karma-chrome-launcher": "^2.0.0",
"karma-coverage": "^1.1.1",
"karma-jasmine": "^1.0.2",
"karma-remap-coverage": "^0.1.4",
"karma-sourcemap-loader": "^0.3.7",
"karma-webpack": "2.0.1",
"webpack": "2.2.0",
"webpack-dev-middleware": "^1.9.0",
"webpack-dev-server": "2.2.0",
"webpack-dll-bundles-plugin": "^1.0.0-beta.5",
"webpack-md5-hash": "~0.0.5",
"webpack-merge": "~2.4.0"

任何帮助解决这个问题的人都表示赞赏.

1> Aluan Haddad..：

---

错误发生在您的测试台配置中

TestBed.configureTestingModule({
  imports: [ReactiveFormsModule, FormsModule],
  declarations: [ FormGroup, XXXXComponent ], // declare the test component
});

FormGroup不属于您的代码,它属于您的代码,因此您无权ReactiveFormsModule声明它.声明意味着NgModule对所声明的所有权的所有权.您也不应该提供,导入或直接导出它.您可以通过导入方式间接导入ReactiveFormsModule,也可以通过导出方式间接导出ReactiveFormsModule.你不能声明它.你不能提供它.

所以将配置调用更改为

TestBed.configureTestingModule({
  imports: [ReactiveFormsModule, FormsModule],
  declarations: [XXXXComponent], // declare the test component
});

---

@BenRacicot我很高兴这个答案对你有所帮助.无论您是否正在测试,这都适用.你实际上_can_列出`import`和/或`exports`中的任何数量的`NgModule`,无论它们是否被使用.你可能做的不是(1)_declare_组件,指令,管道和(2)_provide_属于其他`NgModule的服务.如果这听起来很复杂,那就是.`NgModule`是一个非常复杂且不必要的抽象,没有任何价值(实际上,它具有负值).